Idioms and Phrases with dead ahead
Directly or straight in front of one, as in There's the house, dead ahead. The use of dead in the sense of “straight” dates from the last quarter of the 1800s.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.